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प्रश्न
What is dissipation of energy?
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उत्तर
In transforming the mechanical energy if a part of it gets converted into another form of energy that cannot be utilized for useful work, this loss of energy is called the dissipation of energy.
संबंधित प्रश्न
What is tidal? Explain in brief.
State whether a solar cell produces a.c. or d.c.
MULTIPLE CHOICE TYPE:
The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Two bodies A and B of masses m and M (M ≫ m) have same kinetic energy. Which body will have more momentum?
What kind of energy is possessed in a situation when?
A cocked up spring of air gun.
What kind of energy is possessed in a situation when?
A horse running along a level road
State two advantages and disadvantages of using wind energy for producing electricity.
Match the pairs.
| Group 'A' | Group 'B' | ||
| (1) | Rolling object | (a) | Heat energy |
| (2) | Food | (b) | Atomic energy |
| (3) | Stretched bow | (c) | Kinetic energy |
| (4) | Sunlight | (d) | Potential energy |
| (5) | Uranium |
(e)
|
Chemical energy
|
